Сергей Соколов

function num($amount) {
  return max( 100 * floor($amount / 100), 100);
}

for($i = 0; $i < 500; $i += rand(0,90)) {
	printf("%3d -> %3d\n", $i, num($i));
}

0 -> 100
  2 -> 100
 57 -> 100
105 -> 100
118 -> 100
166 -> 100
249 -> 200
254 -> 200
295 -> 200
307 -> 300
315 -> 300
349 -> 300
403 -> 400
437 -> 400
480 -> 400
488 -> 400

element.id = "kakoj-to-id";
element.name = "kakoe-to-imya";

while(i--) {
    let el = d.createElement('input');
    el.type = 'text';
    el.placeholder = el.id = 'in-' + i;
    el.name = 'v-' + i;
    div.appendChild(el);
  }

<script src="https://api-maps.yandex.ru/2.1/?lang=ru_RU&load=geolocation,geocode"></script>

ymaps.geolocation.get()
  .then(
    result => {
      const pos = result.geoObjects.position;
      return ymaps.geocode(pos, {
        kind: 'locality'
      });
    },
    err => console.log('Ошибка 1: ' + err)
  )
  .then(
    result => {
      const city = result.geoObjects.get(0).properties.get('name');
      document.getElementById('city').innerText = city;
    },
    err => console.log('Ошибка 2: ' + err)
  )
  .catch(err => console.log('Errrr', err));

for (size in burger) { // size будет 'smallburger' и 'bigburger'
  for (prop in burger[size]) { // внутри каждого: 'name', 'cost' и 'ccal'
    console.log(size, prop, burger[size][prop]);
  }
}

<div>
  <span v-for="n in 10">{{ n }} </span>
</div>
<!-- получится 1 2 3 4 5 6 7 8 9 10 -->

.attr('cy', d => (height + paddings.top - xScale(d[1])))